Method of and apparatus for superposing and severing webs



H. E. LEE

Jan. 5 1943.

METHOD OF AND APPARATUS FOR SUPERPOSING AND SEVERING WEBS I Filed Oct.25) 1941 2 Sheets-Sheet l HARRY E LEE f: bNW. m.

J 5, 9 3- H. E. LEE 2,307,142

METHOD OF AND APPARATUS FOR SUPERPOSING AND SEVERING WEBS Filed Oct. 25,1941 2 Sheets-Sheet 2 HARRY E .LEE

' Patented Jan. 5, 1943 I METHOD OF AND APPARATUS FOR 8UP- POSING ANDSEVEBING WEBS Harry E. Lee, Oswego, N. Y., assignor to St. Regis PaperCompany, New York, N. Y., a corporation of New York Application October25, 1941, serial No. 41am 6 Claims. (01. 210-52) This invention relatesto a method of andapparatus for superposin'g and severing webs.More-particularly, it relates to a method and device of this kind wherethe webs are to be formed into a tube" and the tube severed into lengthssuitable for the formation ofmulti-plybags with at least portions of theends of the plies severed at different lengths.

'The object of the invention is to provide a method and means wherebywebs may be superposedand perforated or out along common lines and thenshifted so that the lines are staggered relative to each other in orderthat the webs when finally separated will have staggered edges. Where itis desired that the severed edges of the webs will be staggered atcertain portions differently from their staggering at other portions,the process may be repeated.

Details of the invention and minor objects will appear as thedescription proceeds.

In the drawings forming a part of this application means, indicated at28, for vertical adjustment. I

Web I! in similar manner is guided beneath roller 24 which likewise ismounted for vertical adjustment by suitable means 25. and '24 webs IIand I2 are brought together over guide roll 25 and together with web toare drawn over grid i'l where they may be perforated along such portionof the width as desired by a rotatable carrier 28 which carries a cutteror perforator 29 similar to perforator II.

From grid 21, webs i0 and II are guided under roller 3| and thenceupward. Web ID is carried up over guide roll M, which is mounted by asuitable means 33 for vertical adjustment. From thence, web to is ledbeneath guide rolls 34 and 35.; A paste pan 38 is provided beneath guideRig. 1 is a diagrammatic side view of apparatus As arranged;

there is an upper web l0, anintermediate web j H and a lower web II. Itwill be readily understood that the number of webs may be decreased orincreased as desired with appropriate additions or omissions in theapparatus.

At theleft of Fig. 1, the three webs are shown as being drawn from anydesired source which usually will be large rolls of paper. The webs arebrought together over guide roll I! and then drawn insuperposedrelation, as indicated at l4, to over a grid II. Above the grid ll,there is g cutter support It which carries a perforating knife I! havingteeth ll adapted to enter between the bars I! of grid Ii, as clearlyindicated in Figs. 2 and 3. By this means, perforations' are producedthrough the superposed webs of paper along such portions of the width asdesired. 7

. m the formof device disclosed, web in rolls 34 and 36 and a glue roll31 transfers the glue, paste or other adhesive in pan 36 to a paste pad38 mounted upon a suitable carrier 39. 1

In a similar manner, web I! is carried up over roller 4| mounted forvertical adjustment by means of a suitable mounting 42 and beneath guiderollers 43 and 44. A pan 45 is located beneath rollers 43 and 44 and isprovided with a transfer roller 46 for transferring adhesive to pastepads 41 upon a suitable carrier 48.

Web It is led downward around guide roll 50 and beneath guide roll 5!which is mounted for vertical adjustment by suitable means 52. The webis led upward from adjusting roll 5| over guidevroll 53 and beneathguide roll 54. From rolls 35,44 and 54, respectively, webs In, H and I!are drawn over a guide roll 40 from which they are led together, asindicated at 55, to a suitable tubing machine where they may be formedinto a tube, after which the'completion of the severance may be.eifected.

It will be readily apparent that, after lines have been perforated byperforating device l'l,

webs and It will be retarded in successive degrees with respect to webI. so that, when they reach grid 21, the lines perforated over grid Itwill be shifted with respect .to each other. Thereupon, device 29 mayperforate the webs along the desired portion.

Thereafter by proper adjustment of the rolls I 32, 4! and BI, the lengthof the paths from grid 21 to roller 40 may be so adjusted that when thewebs reach roller 40 the-perforated lines will have 50.

is drawn in a-substantially straight line from the desired relation oneto another. Pads 38 and 41 are arranged to apply vadhesive to the websso that, when superposed over roller 40, they will be adhered togetherfor subsequent manipulation.

It will be readily seen that,-by apparatus of this construction, theportions of the webs which From rollers 22 are perforated by members I?and 29 may be vindicate diagrammatically one arrangement which may bemade which will take advantage of this apparatus to produce successivebag lengths having ends suitable for being closed by the usual pastingoperation and having their side flaps stepped oppositely so that eachply of each side flapwill be adhered 'to the corresponding ply of theother side flap.

The operation of the device may be described in connection with thediagrammatic views.

In Fig. 4, there is a plan view of the superposed webs Ni, ii and I2 asthey leave grid II. It will be seen that they are stepped laterally forconvenience in adhering their edges together subsequently to form amulti-ply tube. It will be seen at the top of Fig. 4 that there isindicated a line of perforations 60 in web I0, 6! at the edge of web II,and 62 at the edge of web i2. It will be readily understood that theperforations extend through all webs so that perforated lines GI and 62extend down as far as line 60. Similarly, at the bottom of Fig. 4, thereis a similar row of perforations, but in this case, the row 63 in theupper web it is longer than the rows 64 and 65 in the lower webs. Fig.is a diagrammatic plan view of the webs as they leave grid 21. Webs iiand I2 are retarded relatively to Web ID so that when again superposedover grid 21, lines 8| and .62 and 64 and B5 are retarded to successivedegrees behind lines and 63 in the upper web iii. By means of member29,'there is pro-- duced another line of.perforations, indicated at Fig.6 is a diagrammatic plan view of the relation of the webs and theirperforations as they leave roller 50. Between grid 21 and roller 40 inthe construction shown the webs l0 and H are retarded somewhat withrespect to web l2 so that the row of perforations 66 in web It is behindthe row 66 in web II, and row 56" in web l2, these three rows havingbeen formed simultaneously by member 29. It will be readily seen that ifthe superposed websare then foldedv into a tube with their edges adheredalong a median longitudinalline of the tube, the unperforated portionsof each web will come at the. edgesof As indicated above, it will bereadily understood that by variation in the portions of the web whichare perforated by the respective perforating members and variation inthe shifting of the webs after the flrstperforation and after the secondperforation, if desired, the final pattern may be varied widely, the oneindicated in Figs. 4, 5 and 6 being merely one pattern which has beenfound desirable for certain purposes.

It will be readily understood also that where the desired pattern at theend of the tube is more simple, only one shifting of the webs may benecessary after the perforating operation. For example, if it wassatisfactory to step both side flaps in the same direction, the singleperforatins operation with subsequent shifting of the webs wouldaccomplish this purpose. 0n the other hand, more complicated designscould be produced by introducing extra shifts as to one or more webs andin the construction it will be readily seen that two or more webs mightbe guided together through any one or more of the desired shifts. Forexample, if it should be desired to shift one of the webs with respectto the others in order to produce an extending portion of one ply onlyat a part of the end of the bag, this could be done readily byperforating that portion of the bag with the webs superposed and thenshifting the single web with respect to the other webs the desireddistance.

While means have been indicated for applying paste to certain portionsof the adjacent surfaces of the plies during the final shifting so as toadhere them together, it will be readily understood that this means maybe varied in accordance with the pattern desired, and may be omitted ifnot found necessary. a

It will be readily seen that by this method and apparatus, there hasbeen devised an arrangement wherein a single perforating member may beemployed for simultaneously perforating as many webs as desired, and atthe same time, the perforations in the webs may be shifted relative toeach other in the final tube to the degree desired simply by adding thedesired guide rolls and the tube when the tube is collapsed. In thiscase,

the tube may then be run under a cutting apparatus and all webs cut offsquarely across the lines indicated at 67 and slit along lines indicatedat 58. It will be understood, of course, that after the cutting of thepaper along lines 31 and S8, suitabletension may be placed upon the tubeso as to tear the webs along the respective lines of perforation so asto complete the severance of the tube.

'I'hereupon, it will be seen that the corners of the bags will besevered along lines which form continuations of perforated lines 6| and66' while the web it will extend a longer distance in one of the sideflaps up to lines 6D and 63 while it will be shorter on the other sideflap, terminating at line 66. Conversely, web II will be cut off shorterat line 62 and on the side flap where web l0 extends the farthest,whileweb l2 will extend to line 86" on the side where web i0 is theshortest. In this way, the two side flaps will be stepped inopposite'directions. i

adjusting them as required.

What I claim is: a

1. Apparatus for perforating webs comprising means for superposing aplurality of webs, means for advancing the superposed webs, means forperforating the webs along at least a portion of a line transverse tothe line of movement of the webs, means for separating and againsuperposing the-webs, and means for adjusting the lengths of theindividual paths of the webs between such separation and secondsuperposition.

2. In apparatus for perforating elongated webs of paper, means forsuperposing the webs and moving them forward longitudinally of the webs.

means for perforating a portion of the webs transversely of the line ofmovement, means for thereafter separating and again superposing the websa plurality of times, means for adjusting the lengths of the individualpaths of the webs between each separation and resuperpositioning, I

and means for perforating an additional portion of the webs transverselyof their line of movei231; at each successive superposition except the3. Apparatus comprising means for su o a plurality of webs of paper,means ran 13:

perforations through the superposed webs along a certain line, means forthen separating the webs, and means for applying adhesive to a surfaceof one of the separated webs that is towards another of the webs, andmeans for again superpositioning the webs with the lines of perforationsshifted and with the adhesive uniting the webs in said shifted position;v-

4. The method of perforating webs of paper which comprises superposing aplurality of webs, producing perforations along certain lines throughthe superposed webs, thereafter separating the webs, shifting them withrespect to each other, and again superposing them with the perforatedlines shifted respectively from each other. 5. A method which comprisessuperposing a plurality of webs of paper, producing perforations throughthe superposed webs along a certain line.

separating the webs and again superposing them with the lines ofperforations shifted with respect to each other, and again perforatingthe superposed webs along another line, again separating them, and againsuperposing with the perforations along said other line shifted withrespect to eachother.

6. The method which comprises superposing a plurality of webs of paper,forming perforations

